The Extech General Purpose pH/Ref Probe is built with a rugged, polycarbonate construction. It features a glass pH sensing bulb surrounded by protective teeth for bulb protection against breakage.

Features:

• All pH electrodes are Ag/AgC1 gel filled (fast response: 95% in 5sec)
• Includes 39" (1m) cable with BNC connection and storage solution
  bottle or cap. 6 month warranty
• Rugged, polycarbonate construction features glass pH sensing bulb
  surrounded by protective teeth. pH range (0 to 14pH), operating
  temperature (32 to 176°F).